(19)

(11)

EP 2 235 738 A2

(12)

(88) Date of publication A3: 11.03.2010 (43) Date of publication: 06.10.2010 Bulletin 2010/40 (21) Application number: 08860548.0 (22) Date of filing: 12.12.2008

(51) International Patent Classification (IPC):  H01J 49/40(2006.01) H01J 49/00(2006.01) (86) International application number: PCT/GB2008/004085 (87) International publication number: WO 2009/074799 (18.06.2009 Gazette 2009/25)

(84) Designated Contracting States: AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MT NL NO PL PT RO SE SI SK TR Designated Extension States: AL BA MK RS (30) Priority: 12.12.2007 GB 0724295 (71) Applicant: Isis Innovation Limited Oxford 0X2 7SG (GB)	(72) Inventors: BROUARD, Mark Oxford OX1 3QZ (GB) VALLANCE, Claire Oxford OX1 3TA (GB) NOMEROTSKI, Andrei Oxford OX1 3RH (GB) (74) Representative: Robinson, Simon John  Barker Brettell LLP Medina Chambers Town Quay Southampton SO14 2AQ Southampton SO14 2AQ (GB)